今天小编给大家分享的是GMAT句子改错语法考点盘点，希望对大家有所帮助。
在简单句的基础上，可以通过连词把句子变成合句和复句。连词包括并列连词 & 从属连词，所以并列连词或者分号链接的是合句，从属连词链接的是复句，这个时候就会来考察大家对于句子完整性的判断，对连词的使用，标点符号的使用等内容。
举个例子~
Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, arenow drawing solid conclusions about how the human brain grows and how babies acquire language.
A.Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
B.Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
C.Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
D.Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
E.Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,
选A
题目分析：
原句有点长，但主干很简单，去掉长长的插入语having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood，

主干为：
Neuroscientists are now drawing solid conclusions about how the human brain grows.
选项分析：
A选项：Correct. 本选项在语法和逻辑上均是正确的。
B选项：and是连词，需要连接两个句子。但在本选项中，and身前的句子没有谓语动词。
C选项：and身前的句子没有谓语动词错误同(B)。
D选项：主干和修饰互换，逻辑变。
E选项：主干和修饰互换，逻辑变。
2、修饰
（占比：60% 难度：中等）
修饰包含四种修饰关系：定语、状语、同位语和插入语
在修饰当中，经常作为出题点的比如说：短语在句首；逗号doing在结尾，表结果或伴随。
举个例子：
By sucking sap from the young twigs of the hemlock tree,tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to dropprematurely.
A.tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop